@article {1490173,
	title = {Clinical trial cohort selection based on multi-level rule-based natural language processing system},
	journal = {Journal of the American Medical Informatics Association},
	volume = {26},
	number = {11},
	year = {2019},
	pages = {1218{\textendash}1226},
	url = {https://doi.org/10.1093/jamia/ocz109},
	author = {Chen, Long and Yu Gu and Xin Ji and Chao Lou and Zhiyong Sun and Haodan Li and Gao, Yuan and Yang Huang}
}
